تفاعل #586111

معادلة التفاعل

(2-chloro-5-(3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-dihydro-2H-pyrimdin-1-yl)-4-fluorobenzoyloxy]-2-methylpropionic acid

N,N-dimethylsulfamide

triethylamine

→

title compound

2-[2-Chloro-5-(3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-di-hydro-2H-pyrimidin-1-yl)-4-fluorobenzoyloxy]-2-methylpropionic acid N,N-dimethylsulfamide

المذيبات

thionyl chloride

dichloromethane

dichloromethane

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةthe reaction mixture was heated
2. 2
   درجة الحرارةunder reflux for 3 hours
3. 3
   تركيزthe resulting solution of the acid chloride was then concentrated
4. 4
   workup.ADDITIONwas then added dropwise
5. 5
   تركيزconcentrated
6. 6
   workup.DISSOLUTIONthe residue was then dissolved in ethyl acetate
7. 7
   غسيلThe organic phase was washed with 10% strength hydrochloric acid and water
8. 8
   تجفيفthe organic phase was dried over sodium sulfate
9. 9
   ترشيحthe drying agent was filtered off
10. 10
    تركيزthe filtrate was concentrated

الإجراء التجريبي

0.65 g (1.4 mmol) of 2-[(2-chloro-5-(3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-dihydro-2H-pyrimdin-1-yl)-4-fluorobenzoyloxy]-2-methylpropionic acid from example 4.2 was dissolved in 30 ml of thionyl chloride, the reaction mixture was heated under reflux for 3 hours and the resulting solution of the acid chloride was then concentrated. 0.18 g (1.4 mmol) of N,N-dimethylsulfamide, 0.07 g (1.4 mmol) of 4-dimethylaminopyridine and 0.35 ml (3.5 mmol) of triethylamine were dissolved in 10 ml of dichloromethane, and a solution of the acid chloride which had been prepared beforehand in 10 ml of dichloromethane was then added dropwise. The solution was stirred for 16 hours and then concentrated, and the residue was then dissolved in ethyl acetate. The organic phase was washed with 10% strength hydrochloric acid and water, the organic phase was dried over sodium sulfate, the drying agent was filtered off and the filtrate was concentrated. Column chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 2:1) gave 0.30 g of the title compound of melting point 211-213° C.

المصدر